I have 2 different DBs: one is my Grocery List and one is my inventory of what's in the pantry/freezer.

Question: Item name - I know I can use DB Popup to link from Grocery List to Inventory, BUT, can I also use the DB Popup to link from Inventory to Grocery List, using the same fields? Or would that confuse the databases.

Sorry if this is detailed somewhere, but when I did a search I couldn't find anything.

The DB Popup field type is actually suitable for pulling field values from one database to another, but does not create links or relationships. If you want the lookup functionality that DB Popup fields provide, then the answer is yes - you can have DB Popup fields in the grocery database that pull values from the inventory database and vice versa.

If you want to relate records in one of the database with records in the other database, I recommend you consider using the relationship field type. You can use this field type to create a parent/child structure where the value of a field in the parent (grocery) database is related to a field in the child (inventory) database.

You can use relationships that go from the grocery database to the inventory database and vice versa.